Wikipedia encourages editors to use IPA symbols to give pronunciations of relevant words. One of the articles designed to help editors is Help: IPA. In this, a large selection of IPA vowels and consonants are listed in the form of a big table. Each symbol has a loudspeaker icon for you to click to hear a recording of the sound, and the symbol itself links to an appropriate article; you may be surprised to hear that WP has a separate article on just about every possible IPA segment. The layout of the items is a bit unfamiliar to phoneticians – since the page is aimed an non-phoneticians wanting to look up possible symbols, they appear under the letter of the alphabet that they resemble.

I’ve listened to all the items, and found fault with a number of them. Some are just slightly off what I think is the correct pronunciation, others seem a bit weird. I’ve made notes on each item and written them in the right-hand column of the table, then copied this to my personal space on WP (the so-called “sandbox”) which you can find here. If you’re interested, you can listen to the recordings and find if your opinion of the sound agrees with mine.